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// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (C) 2018 Simon Shields <simon@lineageos.org>
//
#ifndef _NET_SIPC_SIPC_H
#define _NET_SIPC_SIPC_H 1
#include <linux/miscdevice.h>
#include <linux/netdevice.h>
#include <linux/sipc.h>
#include <linux/wait.h>
/* Keep each incoming skbuff below 1 page */
#define MAX_RX_SIZE (4096 - 512)
#define MAX_MULTI_RX_SIZE (16 * 1024)
#define HDLC_START ((u8)0x7f)
#define HDLC_END ((u8)0x7e)
extern struct sipc_link *cur_links[SAMSUNG_IPC_FORMAT_MAX];
extern struct sipc_link_callback *callbacks;
union sipc_header {
struct fmt_header fmt;
struct raw_header raw;
struct rfs_header rfs;
};
struct hdlc_header {
union sipc_header sipc_header;
u32 len;
u32 frag_len;
char start;
};
struct sipc_io_channel {
/* populated from dt */
u32 format;
u32 type;
u32 channel;
const char *name;
/* initialised at runtime */
struct samsung_ipc *sipc;
struct sk_buff_head rx_queue;
wait_queue_head_t wq;
atomic_t use_count;
struct miscdevice miscdev;
struct net_device *netdev;
/* pending sk buffs */
struct sk_buff *fmt_skb[128];
/* per-network interface RX */
struct delayed_work raw_rx_work;
/* sometimes a packet might come over multiple frames */
struct hdlc_header pending_rx_header;
struct sk_buff *pending_rx_skb;
};
#define misc_to_chan(m) container_of(m, struct sipc_io_channel, miscdev)
struct sipc_netdev_priv {
struct sipc_io_channel *chan;
};
struct samsung_ipc {
struct device *dev;
struct sipc_io_channel *channels;
int nchannels;
int version;
struct sk_buff_head tx_queue_rfs;
struct sk_buff_head tx_queue_fmt;
struct sk_buff_head tx_queue_raw;
bool raw_tx_suspended;
struct completion raw_tx_resumed;
struct delayed_work tx_work;
struct workqueue_struct *tx_wq;
struct sipc_link_callback link_cb;
};
#define cb_to_ipc(cb) container_of(cb, struct samsung_ipc, link_cb)
extern const struct file_operations sipc_misc_fops;
int sipc_get_header_size(int format);
void sipc_netdev_setup(struct net_device *ndev);
#endif
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